The Harken 57 mm carbo ratchet block (model 2135) is designed for use as an Optimist mainsheet block or Laser® / ILCA® mainsheet block. Featuring a machined aluminium sheave with 8 facets, it securely holds the line.
Key features:
- Sheave diameter: 57 mm
- Maximum line diameter: 10 mm
- Weighs only 85 grams
A high-performance block for smooth, reliable sailing.
